Mine roof support



Mayu, 1948' J. M. PHlLLxPs 2,441,33

MINE ROOF SUPPORT med Nov. 17, 1945 z' F '9 5 ATToRNEYf Patented May 11, 1948 ,UNITED-#STATE Y Y ROOF SUPPORT James 1M. Phillips, Pittsburgh, Pa., assignor to Y y Phillips Mine and Mill Supply Company, Pittsv burgh,Pa., a corporation of Pennsylvania v Vrz, 1945, seria1N0..629,236

y Application November 'z claims.

This invention relates to the supporting of roofs of mines and other underground workings, and is for a bracket for supporting timbering or cross beams under the roof of such a mine or underground working.

In the digging of mines and various types of subterranean tunnels, it is the practice, as the mineV or tunnel is extended, to put cross timbers under the rock or earth formation which forms the roof of the tunnel. These cross timbers or roof supports are ordinarily held' up against the roof of the mine by vertical posts at each side of the tunnel or mine entry. Since the roof supports are usually quitey close together, this requires a considerable amount of timber. Also since the timber is of substantial dimensions it reduces the useful width of the tunnel or entry and requires added clearance'for mine cars and mine locomotives.

The present invention has for its object to porvide a bracket or support which may be anchored into the side walls of the mine entry or tunnel and provide a support for the cross beams under the roof. n

My invention maybe more fully understood by reference tothe accompanying drawing, lin which: l

Fig. 1 is a perspective view representing the upper portion of the interior of the mine showing the support of my invention in place and holding up the cross timbers which support the roof:

Fig. 1 is a perspective view of a preferred embodiment of my invention;

" of the pins 2 inwardly of the heads is a cross member or strap 4 which has a downwardly turned eye portion 5 at one end thereof through which one of the pins 2 is loosely passed. This forms a pivoted or hinged 'connection between the strap and one of the pins while the other f Inl/other words, vthe holes drilled in the wall of the supporting elements in the plane of line V-V of Fig. 4. Y

Referring first to Fig. 1, A designates one side Wall of a tunnel or entry of a mine, B is the roof, and C are roof supports which may be either timbers or structural steel members. They ex-V tend across the full width of the tunnel or entry, bear against the roof,vand are supported at each end by the supports constituting the present invention.

l'The supports as shown in Fig. 2 preferably f comprise two long metal pins 2 having head portions 3 at the outer ends thereof. These pins are driven into holes drilled into the faces of the side walls. Supported on the projecting ends the mine to receive the pin 2 need not be accurately spaced, and the strap 4 will be in position to hold the rough timber or beam notwithstanding this slight inequality. If the strap were provided with .tWo eyes similar to the eye 5 so that the two pins were held in fixed spaced relation, the holes for the pins would have to be very accurately positioned.

Also with this arrangement the pin which passes through the eye, together with the strap, can rst be secured to the wall with the strap 4 hanging vertically downward. Then the timber can be put into place, the strap 4 swung up to position under the'timben. and the second pin may then be driven.

The strap 4 is preferably provided with some kind of abutments such as the upwardly extending lugs 6 properly spaced so that the timber which is supported thereon cannot slide up.

The device as described can be quickly installed in place, excessive time is not required in the positioning of the holes to receive the pins, the timbering can be put in place, the strap raised to position, and the second pin put in so that the timbering can press against the roof of the mine and' does not have to be shifted about to get it in place, When it is in place, the eye 5 preventsvthestrap 4 from moving in the drection of its -lengthoffy either ofthe pins. Therel fore -When the installation is made, t-is safe,

avoids supports up the side wall of the mine, and saves considerable expense. K A The modification shown in Fig. 3 is quite similar to that shown in, Fig. 2,r except the support, instead of havingvra jstrap element made from rolled metal forged to shape, isiin the form of a casting.

In Fig. 3 the pins as before are designated 2. The support comprises an integral casting 1 having downwardly directed lugs 8 at one end forming a groove or panel crossWise of the under member 'I to bear upon the right-hand pin 2. The member 1 merely rests on the left of the two pins. The casting is provided at each end with upstanding lugs 9 for holding the timber inpiace. j

In this arrangement; in Fig. '2, the support pivots on one pin and is loosely supported on the other. It can be used in the same manner as the form shown in Fig. 2, and the saddle-like engagement provided by the fitting of the -lugs Y8V` astraddle one of the pins serves to keep the support from shifting in the direction "f itslength relative to the pins.. At the sangemt Vthe upstanding llugs 9 prevent thetiinbering of t l ie l cross pins from slipping off Athe support. The

heads of the pins in this forni, as in theiorrn shown in Fig. 2, prevent the strap or support from. moving Aoutwardly from its position close to ihfdffh Wall- Iijtn coins tr11gto11- Shown in Figs 4 and' 5, the two pins, designated I0, are of like construction, and ,is Vprovided at its outer eiii with a haii round proiciion Al i that-is bent tack over the shank of the pin for ashort distance; providingJ hook-like rmatibng- 1 A flat piece of metal il 2 spans the distance lbetween the two pins. it isy ngageiiurider the hooks-ii. iiitnis iiistance, as Withy thje other 'two modificationsjone pin may rs't be into place, the 'c ro s`s beam or timbe'nsh'own in I Eig. ff 1 a's jbei r i g a n i[beam may then be, raised' into position', the support 12 then inserted under it,y engagirigjunder the jhooi of` the pin wiiihjisiirst *driven* amiiiien tii'e Sieberid Pin '1S drvn im@ Lp. ag beding the 100i supporting Imember'or timber against the roof; The Cross beain 'is restrained against siiiitiiig'in the direction ditte 1e iii the strap i; masmuch as the nobr:Y p 'o tions `Il providejabiitments' in which thetmbhgwrvssem 'Wbuld Strike if ittended t'o moveiiion "direbtionbrrthe other transversely of its il'erigihu A's' sfii'ovvn jin Figi 5, the strapV vI2 is confined he'two'roundedsurfacessothat it anzafc dat`-ts1jtos1glit irregularities :in the heights yof `the `two 4 pins vi/itho'ut fbindin'gwvw following claims.

Iclaim: 1. A supporting assembly *for roof supports of a mine 4or the Ylike Acomprising afpair of separate pins .adapted tobe :entered `into one of the irsid'e Walls of the inine, vfandfa. fcros's member .mounted on and spanning said pins and having one end pivotally movable relatively to one of them and on which one end portion of the roof support may be set, the other end of said cross member being straight and. adapted to be rested on the other of said pins.

2. A supporting assembly for roof supports of a inirie or the'jlike comprising apair ofA separate pins adapted to be entefd into one of the side walls of the mine, and a cross member mounted on said pins and having one end pivotally movabi relatively to one of them and on which one -endportin of the roof support may rest, the

restedupon the g said pinsr 'sii-ci Aiiai'fiiig' -ir'ieaiis adjacent one rid thereof embracing inne, f'sai'djpii'isv for restraining ythe cross member against movement intiemecitt ifiiheiiahiiaiiii i@ an im. fl.' .A stipportirigas'se'm fort-he' r'ofsupports oiiiiiiiefr-theiike ratei P11155; 1a irQSS misgegaan' l ihroiighggwhich 951e. 10i th pmsfbsls' lov'idg a hinged ioonnetion between the cross member ndtllq 4 ;5; as' ppoitiigfasserribiyior the :iper supports 0f, amine giiheii Qiiiptis naar i Sbarat pins, cijossfh'ienber resting on vand spanning the saiapiiisand n av'ing ns at one iid thereof for 'embracing yone of pins and providing a pivotingconnection between' said pin and ergst er; sf-@1 cross iiie'iiib'ei' having `t` "s` heen-bet een which ne roof vsupport lmail liit.

f6; A suppfrting'asemblr fr-the -rooisupiorts Qi, a minepr the like. imposing a pair Of S'b'efie 45 pins'ras'cross member resting on anti spanning the said pins' and-having inans at -ie vvend thereof f or embracing one oi said pins and vproviding-apivoting-'onn"otion'btween 'said pin and svv b saicirossifieinberhaving-spabed meep btweeri'ivhiii 'an end porti'onof a liin' roof support inail t, bot-h 'of said` pinsphaving enlarged heads on the outer ends thereof;

JAMES M. Pd

1.559,539 Doughty Nov.. 3. 1925 `2,121,291 .Habe June "21,' 1938 

